Limit the size of URL cache files' names
Limit the size of URL cache files' names

URLs can be very long but filenames can't. If the filename would be too
long, truncate it and append the SHA-1 hash of the full URL. This
conserves uniqueness and still allows the user to recognize the files.

VisTrails/VisTrails,minesense/VisTrails,VisTrails/VisTrails,minesense/VisTrails,VisTrails/VisTrails,VisTrails/VisTrails,VisTrails/VisTrails,minesense/VisTrails,minesense/VisTrails,minesense/VisTrails